BothLang for Firefox

Bilingual website translator for Mozilla Firefox

Translate webpages without hiding the source. BothLang adds translated passages to the page and also lets you translate selected text when you only need a word or sentence.

Add to Firefox

Official listing on Firefox Browser Add-ons

Mozilla Firefox logo

How to install BothLang in Firefox

  1. 1

    Open the BothLang listing on Firefox Browser Add-ons.

  2. 2

    Select Add to Firefox and review the requested permissions.

  3. 3

    Confirm Add when Firefox asks for approval.

  4. 4

    Open the Extensions button and pin BothLang to the toolbar if desired.

What you can do after installation

Translate webpages

Keep original and translated passages connected in one reading flow.

Translate selected text

Focus on a word or passage without translating everything else.

Choose a provider

Use Google, Microsoft Edge, or eligible Gemini-powered translation.

Explore bilingual translation →Read common questions →